phyhlum Arthropoda 
classis Trilobitomorpha 
classis Chelicerata
classis Crustacea
Maxillopoda Dahl 1956
Cirripedia
Copepoda
Branchiura
Mystacocarida
Ostracoda
Thoracopoda 
"we give them the collective
name ..., a term equivalent in rank to the Maxillopoda" (:p.440)
Malacostraca
Cephalocarida
Branchiopoda
classis Myriapoda
classis Insecta
relationship is still undecided:
Onychophora
Tardigrada
Pentastomida
Pantopoda